Enrichment of uranium at the plant was halted in July 2004 during negotiations with European countries. In 2006, Iran announced that it would resume enrichment. In September 2007, the Iranian government announced that they had installed 3,000 centrifuges at Natanz. In 2010, the International Atomic Energy Agency (IAEA) was told by the Iranian government that future enrichment programmes would take place at Natanz, and they would start in March 2011.[6]